people think it's rain forests or terrestrial environments. it's coral reefs and they are disappearing far too quickly around the world. >> thank you. also, stick around to check out this. this is amazing. i want to show the viewers. these are birds. starlings to be exact. they are flying synchronized here. it looks like dark clouds. this is over israel. we understand they do this to find food and also to be a defense against birds of prey so they appear to be one big mass. have you ever seen anything like it? >> i have never seen anything like this with this species of birds n. the ocean, fish swarm in similar ways. it is an effective defense that confuses birds, animals. it can confuse a predator. if nothing else, it's so beautiful, isn't it? a reminder of the wonder of nature. how graflt we should be that there are still sights like this left in the world. >> it is beautiful. it reminds me of hitchcock's "the birds," too. there are two sides to it. just saying. >> indeed. that's in the back of one's mind. >> thanks. good to see you. >>> ima